The statement that they were “married, and given in marriage” highlights the generic nature of the “events” placed in this time set. Nephites had been marrying since the beginning of their society. There was nothing unusual. In fact, the statement is here precisely because it is usual. The emphasis is on the continuation of normal life during these pseudo-millenialistic years.
Reference: The language of verse 11 certainly owes form and vocabulary to phrases from the New Testament. The passage from Luke serves as an example:
Luke 20:34-35
34 And Jesus answering said unto them, The children of this world marry, and are given in marriage:
35 But they which shall be accounted worthy to obtain that world, and the resurrection from the dead, neither marry, nor are given in marriage. (see also Matthew 22:30; Mark 12:25; Luke 17:27).
The contexts of the phrases are very different, despite the similarity in vocabulary. The closest the passages come is in the 4 Nephi verse’s correlation to Luke 20:34 where being married is an indication of a normal pursuit. That would appear to be the meaning in the 4 Nephi context. Marriage is a normal thing, and normal life occurred in those times of blessing. The New Testament passage deals with questions of marriage in the next life, which has no contextual similarity to the use of the phrase in 4 Nephi. Once again we have the influence of New Testament vocabulary without any indication that the text that supplied the vocabulary model also supplied the conceptual model.